On Fri, Aug 9, 2024 at 3:09 PM Vlastimil Babka <vbabka@xxxxxxx> wrote: > > On 8/9/24 05:57, Suren Baghdasaryan wrote: > > Maybe it has something to do with NUMA? The system I'm running has 2 NUMA nodes: > > I kinda doubt the NUMA aspect. Whether you allocate a vma that embeds a > lock, or a vma and immediately the separate lock, it's unlikely they would > end up on different nodes so from the NUMA perspective I don't see a > difference. And if they ended up on separate nodes, it would more likely be > worse for the case of separate locks, not better. I have an UMA machine. Will try the test there as well. It won't provide hard proof but at least some possible hints.
